All terms in this list:
crust: the thin and solid outermost layer of the Earth above the mantle
mantle: the layer of rock between the earth crust and core
core: the central part of the Earth below the mantle
lithosphere: the solid outer layer of the earth that consists of the crust and the rigid upper part of the mantle
asthenosphere: the soft layer of the mantle on which the tectonic plates move
mesosphere: the strong lower part of the mantle between the asthenosphere and the outer core
tectonic plate: a block of lithosphere that consists of the crust and the rigid outermost part of the layer
continental drift: The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their new present location.
sea-floor spreading: The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.
plate tectonics: The theory that explains how large pieces of the earth’s outermost layer, called tectonic plates
convergent boundry: The boundary formed by the collision of lithosphere
divergent boundry: The boundary formed by lithosphere moving away.
transform boundary: The boundary formed by moving horizontally
uplift: the rising of regions of the earths crust to lighter elevations
subsidence: the sinking of the regions of earths crust to lower elevations
compression: stress that occurs when forces act to squeeze an object
tension: stress that occurs when forces act to stretch an object
folding: the bending of a rock layer due to stress
fault: a break in a body of rock along which one block slides relative to the other
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